Recover My Lost FF Account

I am writing about my Garena Free Fire account, which I was using on an Android device with Facebook login. On 17 February 2021 my Free Fire ID appears to have been hacked and I suddenly lost access. The mobile number and contact details on the linked Facebook account were changed without my permission, so I can no longer log in or receive any verification codes. I have not been able to access this Free Fire account since that date. I did not share my login information with anyone and did not authorize any changes to my account or Facebook details. My clear request from Garena is to restore access to the same Free Fire ID that was hacked, and to help me log back into my game account safely. I kindly ask you to investigate this incident, verify that I am the rightful owner using your internal records, and assist me in recovering my account.